Microchip HV9967B Bedienungsanleitung

Lies die bedienungsanleitung für Microchip HV9967B (18 Seiten) kostenlos online; sie gehört zur Kategorie Nicht kategorisiert. Dieses Handbuch wurde von 28 Personen als hilfreich bewertet und erhielt im Schnitt 4.0 Sterne aus 14.5 Bewertungen. Hast du eine Frage zu Microchip HV9967B oder möchtest du andere Nutzer dieses Produkts befragen? Stelle eine Frage

 2023 Microchip Technology Inc. and its subsidiariesDS20005734B-page 1

HV9967B

Features

•3% Accurate LED Current

•60V, 0.8Ω Integrated MOSFET

•Low Sensitivity to External Component Variation

•Single-Resistor LED Current Setting

•Fixed Off-Time Control

•PWM Dimming Input

•Output Short-Circuit Protection with Skip Mode

•Overtemperature Protection

Applications

•DC/DC or AC/DC LED Drivers

•RGB Backlighting Drivers for Flat Panel Displays

•General Purpose Constant-Current Source

•Signage and Decorative LED Lighting

•Chargers

General Description

The HV9967B is an Average-mode current control LED

driver IC operating in a Constant Off-time mode.

The IC features an integrated 60V, 0.8Ω MOSFET that

can be used as a stand-alone buck converter switch or

connected as a source driver for driving an external

high-voltage Depletion-mode MOSFET. The HV9967B

is powered through its switching output when the

integrated switch is off. Therefore, the same external

MOSFET can be used as a high-voltage linear

regulator for powering the IC.

The LED current is programmed with one external

resistor. The Average-mode current control method

does not produce a peak-to-average error. This greatly

improves the current accuracy as well as the line and

load regulations of the LED current without any need

for loop compensation or direct sensing of the LED

current at a high-voltage potential. The auto-zero circuit

cancels the effects of the input offset voltage and of the

propagation delay of the current sense comparator.

Package Types

8-lead MSOP

(Top view)

8-lead WDFN

(Top view)

GND

SW

RSENSE

PGND

PWMD

VDD

AGND

RT

NC

1

2

3

4

8

7

6

5

1

2

3

4

8

7

6

5

SW

RSENSE

PGND

PWMD

VDD

AGND

RT

NC

See Table2-1for pin information.

Integrated LED Driver with Average-Mode Current Control

Produktspezifikationen